INTERVIEW: JIM WIETHORN
D.Ann Shiffler speaks with Engineering’s Jim Wiethorn, who recently
his Ph.D., fulfilling years old promise. His research has led to breakthrough
conclusions.

RIGGING REVIEW:
A Liebherr tower crane was erected in Canada as a permanent and innovative learning tool.

ACTTOWERCRANE50:
ACT’s exclusive ranking of North America’s top tower crane-owning companies. With numbers rising slowly but steadily, check out how each
company stacks up.

PRODUCT FOCUS: ROUGH TERRAIN CRANES
Manufacturers are designing RTs to be safer and easier to operate and transport.

PROJECT ROUNDUP: SPECIALIZED RIGGING
ACT’s annual roundup of some pretty amazing rigging jobs.

TECHNOLOGY FOCUS: REMOTE CONTROLS
What’s new in the realm of remote controls? Hannah Sundermeyer reports.

SITE REPORT: LIFTING
When operator visibility was limited, F.A. Wilhelm Construction opted for a hook camera.

SITE REPORT: TRANSPORT
Global Specialized Services fought against the clock on a 180,000-pound tower haul.

SYNOPSIS
Bill Smith breaks down DVIRs.